Pulley.



PATENTED AUG. 27, 1907.

P. D. SKAHEN. PULLEY.

APPLICATION FILED DEG. 12, 1906.

2 SHEETS-SHEET 1.

No. 864.570. PATENTED AUG. 27, 1907 P. D. SKAHEN.

PULLEY.

APPLIUATION FILED 1330.12, 1906.

2 SHEETS-SHEET 2.

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ru: mmms PETERS 1:0,, wasnmmau, n c.

UNITED STATES PATENT OFFICE.

PULLEY.

Specification of Letters Patent.

Patented Aug. 27, 1907.

Application filed December 12,1906. Serial No. 347,530.

To all whom it may concern:

Be it known that l, PATRICK D. SKAIIEN, a citizen of the United States,and a resident of Syracuse, Onondaga county, State of New York, haveinvented certain new and useful Improvements in Pulleys, of which thefollowing is a specification.

This invention relates to metal pulleys and especially to a pulleyconstructed of sheet metal parts prdperly stamped or pressed into shapeand suitably connected together.

The invention will be described in connection with the accompanyingdrawing in which,

Figure l is a side view of a pulley embodying the invention, the lowerhalf of the pulley being shown in section on the line 1-1 of Fig. 2;Fig. 2 is a plan view of on e-half of the pulley shown in Fig. 1; Fig. 3is a section on the line 3-8 of Fig. 1; Fig. 4 is a section on the line4-4 of Fig. 1; Fig. 5 is a plan view of a blank from which the innerspoke members are formed; Fig. 6 is a side view of spoke members formedfrom the blank shown in Fig. 5.

Referring to the drawing, A, B, indicate the two halves of a split ordivided pulley. These two halves are constructed exactly alike exceptthat the meeting ends of the rim sections are preferably formed to interlook by means oi projections upon the one part and re cesses in theother, in order that the meeting ends of the rim may register exactly.

Each of the pulley sections comprises a semi-cylindrical rim 1, asemi-cylindrical hub 2, and a plurality of radial spokes connecting therim with base pieces 0 which support the hub. Each of the base pieces Cconsists of a web 3, an outer flange 4 extending toward the radial linesdividing the pulley sections and having a semi-circular recess toreceive and support one end of the hub section and an inner flange 5 towhich the spokes are connected. Said inner flange being preferably in aplane parallel with the plane of the outer flange and extending towardthe rim of the pulley section. The flange 4 is in depth substantiallyequal to the radius of the hub section and the flange 5 should be deepenough to permit of securely attaching the spokes to it. There are twobase pieces to each pulley section, the said pieces being arranged withthe flanges 4 at the outside and the flanges 5 at the inside, adjacentto each other.

Instead of connecting the spokes directly to the rim 1, it is preferredto connect them to the semi-circular inner rim sections 6 and to connectthe latter to the rim sections 1. The pulley is thus strengthened andstiffened and presents a smooth periphery as the numerous rivetsrequired to connect the spokes with the inner rim 6 are hidden, a veryfew rivets being suflicient to connect the inner and outer rims.Furthermore, the inner rim can be made narrower than the outer rim andwithout a bead or flange, which greatly facilitates con necting thespokes with the saidfiinner rim. The outer rim is preferably providedwith a bead or rib 7, at each edge, and rods 8 within the beads or ribsare used to interlock the pulley sections, the ends of the rodsprojecting from one pulley section being adapted to enter the beads orribs 7 of the other pulley section.

The inner spokes 9 of each pulley section are preferably formedintegral, being struck up from a blank similar to that shown in diagramin Fig. 5. These spokes are shown in reduced scalein Fig. 6. They areconnected by an intermediate web 10 which is cylindrical and fits thehub section 2, the spokes being suitably connected with the flanges 5 ofthe base pieces. Each of the spokes 9 is provided with a foot 11 whichrests upon the inner rim 6 and is suitably connected thereto. In thesmaller sizes of pulleys these spokes 9 are sufficient but in largersizes additional spokes 12 are used. The spokes 12 are connected attheir inner ends with the flanges 5 of the base pieces and at theirouter ends they are provided with feet 13 which are connected to theinner rim. The spokes 12 and 9 are placed back to back and arepreferably connected together and to the flange 5 by means of rivetspassing through all of said parts. The two halves of the pulley areconnected by suitable means, as by bolts 14. i

It will be evident that the above described pulley is light, strong anddurable and can be constructed cheaply.

The invention may be embodied in structures which differ more or less inform and arrangement from that illustrated and described, and it is tobe understood that the drawing and description simply disclose oneembodiment of the invention, sufficient for a full understandingthereof.

Having described my invention what I claim and desire to secure byLetters Patent is l. A. sectional sheet metal pulley consisting of twosimilnr halves and means lfor connecting said halves, each pul Icysection comprising two base sections having oppositely extending flangesat their sides, a hub section mounted in the flanges at the outer sidesof the base sections, a rim section, and spokes connecting the flangesat the inner sides of the base sections with the rim section.

2. A sectional sheet metal pulley consisting of two similar halves andmeans for connecting said halves, each pulley section comprising twobase sections having oppositely extending flanges in parallel planes attheir sides, a hub section mounted in the flanges at the outer sides ofsaid base sections, a rim section, and spokes connecting the flanges atthe inner sides of said base sections with the rim section.

3. A sectional sheet metal pulley comprising the hub sections, the basepieces having inwardly turned flanges supporting the hub sections andoutwardly turned flanges, the radial spokes connected to said outwardlyturned flanges, and the rim sections connected to said radial spokes.

4. A sectional sheet metal pulley comprising semi-cylindrical hubsections, base pieces each having a web adjacent to one of the hubsections, a flange supporting the outer end of the hub section and asecond flange to which the spokes are connected, spokes connected tosaid latter flange, and rim sections connected to said spokes.

5, A sectional sheet metal pulley comprising two halfpulley sections,each section comprising a semi-cylindrical hub section, two base pieceshaving outer flanges supporting the hub section at its ends, and innerflanges to which the spokes are connected, radial spokes connected tosaid inner flanges, an inner rim section connected to said spokes, andan outer rim surrounding and connected with said inner rim section.

6. A sectional sheet metal pulley comprising hub sections, inner rimsections, each section having spokes formed by a strip having its endsbent laterally and attached to the inner rim section and connected atintermediate points in its length with a hub section, and outer rimsections surrounding and connected with the inner rim sections.

7. In a sectional sheetmetal pulley, the combination of hub sections,base pieces supporting the hub sections,

spokes connected at their inner ends to the hub sections' PATRICK D. SKAHEN.

Witnesses 1 J. A. Wn'rsox, ARTHUR L. BRYANT.

